The 67 chant grew out of basketball culture, where 6-7 refers to a player listed at six feet seven inches, and it exploded on TikTok in 2025 as fans and school kids turned the height callout into a running joke. Short clips of the chant were remixed into edits, sports highlights, and classroom videos, spreading far beyond basketball because the shout is easy to copy and instantly recognisable. Its staying power comes from that simplicity, making it a quick shorthand for hype, surprise, and playful chaos in short-form video.